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Publication numberUS181653 A
Publication typeGrant
Publication dateAug 29, 1876
Publication numberUS 181653 A, US 181653A, US-A-181653, US181653 A, US181653A
InventorsNapoleon Du Brul
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in slates
US 181653 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

UNITED STATES PATENT FTTCEr NAPOLEON DU BRUL, OFY CINCINNATI, OHIO.

IMPROVEMENT lN SLATES.

Specification forming part of Letters Patent No. l S [,653, dated August 29, 1876; application filed July 6, 1876.

To all whom it may concern Beit known that I, NAPOLEON DU BRUL, of Cincinnati, Hamilton county, Ohio, have invented a new and useful Improvement in Slates, of which the following is a specification:

This invention relates to a school or writing slate having a solid frame; and it consists in forming the letters of the alphabet in the face of said frame in depressed characin intaglio, so that the washin g or wear of the frame shall not obliterate the inscription.

I am aware that a slate-frame has heretofore been made with indentations on its surface to form a scale to indicate length. This, therefore, I do not claim but What I do claim as new, and desire to secure by Letters Patent, is-

As a new article of manufacture, a slate having a solid frame, with the letters of the alphabet in the face of said frame in depress characters, to form a permanent and correct copy for the user of the slate, as herein set forth.

ln testimony of which invention I hereunto set my hand.

l NAPOLEON DU BRUL.

Attest:

GEO. H. KNIGHT, HORACE E. JOHNSON.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6416329 *Aug 8, 2000Jul 9, 2002Kyowa Electric And Chemical Co., Ltd.Writing device for practice in writing characters
US6884082 *Sep 29, 2003Apr 26, 2005Donna JamesSensory feedback educational tool
Classifications
Cooperative ClassificationG09B17/00